At this point, the public has not been requested to take any action, the experts added.

The research center operates a station which is part of a global network of stations which detect radioactive particles throughout the atmosphere. A powerful pump sucks in air and analyzes it after it passes through a high-flow air filter.

The air filter was checked on Tuesday and revealed traces of the
substance Iodine-131 at a concentration of about 0.00005 becquerel per
cubic meter.

Iodine-131 disintegrates at an average rate of one per second within 20,000 cubic meters of air.